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19 Cards in this Set
- Front
- Back
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Amplitude
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the amount or magnitude of displacement from the position of rest
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Volts
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unit of measurement for amplitude
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Peak amplitude
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maximum amplitude relative to POR in a particular direction
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Peak-to-peak amplitude
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the positive peak amplitude of vibration pattern (signal) times two "crest to trough voltage"
[ take the crest and multiply by 2 ] |
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RMS amplitude
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Root, Mean, Square
the portion of displacement that effectively creates acoustical energy [ multiply peak-to-peak amplitude x 0.353 ] |
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When are energy patterns are highest at the P.O.R and stops where?
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at the tails
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_______ is parallel to the amplitude
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Intensity
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Intensity
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the application of amplitude concepts to the decibel scale
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Decibel system
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a logarithmic scale of intensity (dB)
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Alexander Graham Bell
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created the telephone; the decibel scale was created and named in his honor
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Dynamic Range (an intensity range)
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range of intensities from the lowest (just barely detectable) to the highest that humans can tolerate
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A unit of decibels is a unit of
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physical intensity levels
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Sones
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units of loudness
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Chart of Relative dB(SPL)
Physical 100 90 80 70 60 50 40 30 20 10 0 |
64
32 8 4 Chart of Relative dB(SPL) Perceptual (sones) 1 0.5 0.25 0.125 0.0625 or 0.063 |
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Dyne
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a unit of measure for quantifying the pressure in sound waves
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Formula for finding dynes
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dB[SPL]=20logPressureA
0.0002dynes/cm^2 |
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Attenuation
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to decrease
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absolute pressure growth is faster than
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the ear's loudness growth
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If there is no L, the bottom referent (number) can be
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anything you want it to be
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